<i>Because I don’t want to be hooked into the (proprietary) Google stack (Python, Django, BigTable, GoogleOS) just yet, I prefer using Amazon’s Web Services a.k.a. AWS (EC2, S3, SQS, SimpleDB, etc).</i><p>I don't understand this statement given that 2/4 of the things he mentions in the Google stack are open source whereas none of the AWS ones are.